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<div id="overview"><a href="../../../../../../../apidocs/org/inftel/ssa/mobile/ui/widget/DashboardLayout.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   
<a class="jxr_linenumber" name="2" href="#2">2</a>   <strong class="jxr_keyword">package</strong> org.inftel.ssa.mobile.ui.widget;
<a class="jxr_linenumber" name="3" href="#3">3</a>   
<a class="jxr_linenumber" name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> android.content.Context;
<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> android.util.AttributeSet;
<a class="jxr_linenumber" name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> android.view.View;
<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> android.view.ViewGroup;
<a class="jxr_linenumber" name="8" href="#8">8</a>   
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_javadoccomment"> * Custom layout that arranges children in a grid-like manner, optimizing for</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_javadoccomment"> * even horizontal and vertical whitespace.</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/inftel/ssa/mobile/ui/widget/DashboardLayout.html">DashboardLayout</a> <strong class="jxr_keyword">extends</strong> ViewGroup {
<a class="jxr_linenumber" name="14" href="#14">14</a>  
<a class="jxr_linenumber" name="15" href="#15">15</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> UNEVEN_GRID_PENALTY_MULTIPLIER = 10;
<a class="jxr_linenumber" name="16" href="#16">16</a>  
<a class="jxr_linenumber" name="17" href="#17">17</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> mMaxChildWidth = 0;
<a class="jxr_linenumber" name="18" href="#18">18</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> mMaxChildHeight = 0;
<a class="jxr_linenumber" name="19" href="#19">19</a>  
<a class="jxr_linenumber" name="20" href="#20">20</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/inftel/ssa/mobile/ui/widget/DashboardLayout.html">DashboardLayout</a>(Context context) {
<a class="jxr_linenumber" name="21" href="#21">21</a>          <strong class="jxr_keyword">super</strong>(context, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="22" href="#22">22</a>      }
<a class="jxr_linenumber" name="23" href="#23">23</a>  
<a class="jxr_linenumber" name="24" href="#24">24</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/inftel/ssa/mobile/ui/widget/DashboardLayout.html">DashboardLayout</a>(Context context, AttributeSet attrs) {
<a class="jxr_linenumber" name="25" href="#25">25</a>          <strong class="jxr_keyword">super</strong>(context, attrs, 0);
<a class="jxr_linenumber" name="26" href="#26">26</a>      }
<a class="jxr_linenumber" name="27" href="#27">27</a>  
<a class="jxr_linenumber" name="28" href="#28">28</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/inftel/ssa/mobile/ui/widget/DashboardLayout.html">DashboardLayout</a>(Context context, AttributeSet attrs, <strong class="jxr_keyword">int</strong> defStyle) {
<a class="jxr_linenumber" name="29" href="#29">29</a>          <strong class="jxr_keyword">super</strong>(context, attrs, defStyle);
<a class="jxr_linenumber" name="30" href="#30">30</a>      }
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>      @Override
<a class="jxr_linenumber" name="33" href="#33">33</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> onMeasure(<strong class="jxr_keyword">int</strong> widthMeasureSpec, <strong class="jxr_keyword">int</strong> heightMeasureSpec) {
<a class="jxr_linenumber" name="34" href="#34">34</a>          mMaxChildWidth = 0;
<a class="jxr_linenumber" name="35" href="#35">35</a>          mMaxChildHeight = 0;
<a class="jxr_linenumber" name="36" href="#36">36</a>  
<a class="jxr_linenumber" name="37" href="#37">37</a>          <em class="jxr_comment">// Measure once to find the maximum child size.</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>          <strong class="jxr_keyword">int</strong> childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
<a class="jxr_linenumber" name="40" href="#40">40</a>                  MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST);
<a class="jxr_linenumber" name="41" href="#41">41</a>          <strong class="jxr_keyword">int</strong> childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
<a class="jxr_linenumber" name="42" href="#42">42</a>                  MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST);
<a class="jxr_linenumber" name="43" href="#43">43</a>  
<a class="jxr_linenumber" name="44" href="#44">44</a>          <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count = getChildCount();
<a class="jxr_linenumber" name="45" href="#45">45</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; i++) {
<a class="jxr_linenumber" name="46" href="#46">46</a>              <strong class="jxr_keyword">final</strong> View child = getChildAt(i);
<a class="jxr_linenumber" name="47" href="#47">47</a>              <strong class="jxr_keyword">if</strong> (child.getVisibility() == GONE) {
<a class="jxr_linenumber" name="48" href="#48">48</a>                  <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="49" href="#49">49</a>              }
<a class="jxr_linenumber" name="50" href="#50">50</a>  
<a class="jxr_linenumber" name="51" href="#51">51</a>              child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
<a class="jxr_linenumber" name="52" href="#52">52</a>  
<a class="jxr_linenumber" name="53" href="#53">53</a>              mMaxChildWidth = Math.max(mMaxChildWidth, child.getMeasuredWidth());
<a class="jxr_linenumber" name="54" href="#54">54</a>              mMaxChildHeight = Math.max(mMaxChildHeight, child.getMeasuredHeight());
<a class="jxr_linenumber" name="55" href="#55">55</a>          }
<a class="jxr_linenumber" name="56" href="#56">56</a>  
<a class="jxr_linenumber" name="57" href="#57">57</a>          <em class="jxr_comment">// Measure again for each child to be exactly the same size.</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>          childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
<a class="jxr_linenumber" name="59" href="#59">59</a>                  mMaxChildWidth, MeasureSpec.EXACTLY);
<a class="jxr_linenumber" name="60" href="#60">60</a>          childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
<a class="jxr_linenumber" name="61" href="#61">61</a>                  mMaxChildHeight, MeasureSpec.EXACTLY);
<a class="jxr_linenumber" name="62" href="#62">62</a>  
<a class="jxr_linenumber" name="63" href="#63">63</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; i++) {
<a class="jxr_linenumber" name="64" href="#64">64</a>              <strong class="jxr_keyword">final</strong> View child = getChildAt(i);
<a class="jxr_linenumber" name="65" href="#65">65</a>              <strong class="jxr_keyword">if</strong> (child.getVisibility() == GONE) {
<a class="jxr_linenumber" name="66" href="#66">66</a>                  <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="67" href="#67">67</a>              }
<a class="jxr_linenumber" name="68" href="#68">68</a>  
<a class="jxr_linenumber" name="69" href="#69">69</a>              child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
<a class="jxr_linenumber" name="70" href="#70">70</a>          }
<a class="jxr_linenumber" name="71" href="#71">71</a>  
<a class="jxr_linenumber" name="72" href="#72">72</a>          setMeasuredDimension(
<a class="jxr_linenumber" name="73" href="#73">73</a>                  resolveSize(mMaxChildWidth, widthMeasureSpec),
<a class="jxr_linenumber" name="74" href="#74">74</a>                  resolveSize(mMaxChildHeight, heightMeasureSpec));
<a class="jxr_linenumber" name="75" href="#75">75</a>      }
<a class="jxr_linenumber" name="76" href="#76">76</a>  
<a class="jxr_linenumber" name="77" href="#77">77</a>      @Override
<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> onLayout(<strong class="jxr_keyword">boolean</strong> changed, <strong class="jxr_keyword">int</strong> l, <strong class="jxr_keyword">int</strong> t, <strong class="jxr_keyword">int</strong> r, <strong class="jxr_keyword">int</strong> b) {
<a class="jxr_linenumber" name="79" href="#79">79</a>          <strong class="jxr_keyword">int</strong> width = r - l;
<a class="jxr_linenumber" name="80" href="#80">80</a>          <strong class="jxr_keyword">int</strong> height = b - t;
<a class="jxr_linenumber" name="81" href="#81">81</a>  
<a class="jxr_linenumber" name="82" href="#82">82</a>          <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> count = getChildCount();
<a class="jxr_linenumber" name="83" href="#83">83</a>  
<a class="jxr_linenumber" name="84" href="#84">84</a>          <em class="jxr_comment">// Calculate the number of visible children.</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>          <strong class="jxr_keyword">int</strong> visibleCount = 0;
<a class="jxr_linenumber" name="86" href="#86">86</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; i++) {
<a class="jxr_linenumber" name="87" href="#87">87</a>              <strong class="jxr_keyword">final</strong> View child = getChildAt(i);
<a class="jxr_linenumber" name="88" href="#88">88</a>              <strong class="jxr_keyword">if</strong> (child.getVisibility() == GONE) {
<a class="jxr_linenumber" name="89" href="#89">89</a>                  <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="90" href="#90">90</a>              }
<a class="jxr_linenumber" name="91" href="#91">91</a>              ++visibleCount;
<a class="jxr_linenumber" name="92" href="#92">92</a>          }
<a class="jxr_linenumber" name="93" href="#93">93</a>  
<a class="jxr_linenumber" name="94" href="#94">94</a>          <strong class="jxr_keyword">if</strong> (visibleCount == 0) {
<a class="jxr_linenumber" name="95" href="#95">95</a>              <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="96" href="#96">96</a>          }
<a class="jxr_linenumber" name="97" href="#97">97</a>  
<a class="jxr_linenumber" name="98" href="#98">98</a>          <em class="jxr_comment">// Calculate what number of rows and columns will optimize for even</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>          <em class="jxr_comment">// horizontal and vertical whitespace between items. Start with a 1 x N</em>
<a class="jxr_linenumber" name="100" href="#100">100</a>         <em class="jxr_comment">// grid, then try 2 x N, and so on.</em>
<a class="jxr_linenumber" name="101" href="#101">101</a>         <strong class="jxr_keyword">int</strong> bestSpaceDifference = Integer.MAX_VALUE;
<a class="jxr_linenumber" name="102" href="#102">102</a>         <strong class="jxr_keyword">int</strong> spaceDifference;
<a class="jxr_linenumber" name="103" href="#103">103</a> 
<a class="jxr_linenumber" name="104" href="#104">104</a>         <em class="jxr_comment">// Horizontal and vertical space between items</em>
<a class="jxr_linenumber" name="105" href="#105">105</a>         <strong class="jxr_keyword">int</strong> hSpace = 0;
<a class="jxr_linenumber" name="106" href="#106">106</a>         <strong class="jxr_keyword">int</strong> vSpace = 0;
<a class="jxr_linenumber" name="107" href="#107">107</a> 
<a class="jxr_linenumber" name="108" href="#108">108</a>         <strong class="jxr_keyword">int</strong> cols = 1;
<a class="jxr_linenumber" name="109" href="#109">109</a>         <strong class="jxr_keyword">int</strong> rows;
<a class="jxr_linenumber" name="110" href="#110">110</a> 
<a class="jxr_linenumber" name="111" href="#111">111</a>         <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) {
<a class="jxr_linenumber" name="112" href="#112">112</a>             rows = (visibleCount - 1) / cols + 1;
<a class="jxr_linenumber" name="113" href="#113">113</a> 
<a class="jxr_linenumber" name="114" href="#114">114</a>             hSpace = ((width - mMaxChildWidth * cols) / (cols + 1));
<a class="jxr_linenumber" name="115" href="#115">115</a>             vSpace = ((height - mMaxChildHeight * rows) / (rows + 1));
<a class="jxr_linenumber" name="116" href="#116">116</a> 
<a class="jxr_linenumber" name="117" href="#117">117</a>             spaceDifference = Math.abs(vSpace - hSpace);
<a class="jxr_linenumber" name="118" href="#118">118</a>             <strong class="jxr_keyword">if</strong> (rows * cols != visibleCount) {
<a class="jxr_linenumber" name="119" href="#119">119</a>                 spaceDifference *= UNEVEN_GRID_PENALTY_MULTIPLIER;
<a class="jxr_linenumber" name="120" href="#120">120</a>             }
<a class="jxr_linenumber" name="121" href="#121">121</a> 
<a class="jxr_linenumber" name="122" href="#122">122</a>             <strong class="jxr_keyword">if</strong> (spaceDifference &lt; bestSpaceDifference) {
<a class="jxr_linenumber" name="123" href="#123">123</a>                 <em class="jxr_comment">// Found a better whitespace squareness/ratio</em>
<a class="jxr_linenumber" name="124" href="#124">124</a>                 bestSpaceDifference = spaceDifference;
<a class="jxr_linenumber" name="125" href="#125">125</a> 
<a class="jxr_linenumber" name="126" href="#126">126</a>                 <em class="jxr_comment">// If we found a better whitespace squareness and there's only 1</em>
<a class="jxr_linenumber" name="127" href="#127">127</a>                 <em class="jxr_comment">// row, this is the best we can do.</em>
<a class="jxr_linenumber" name="128" href="#128">128</a>                 <strong class="jxr_keyword">if</strong> (rows == 1) {
<a class="jxr_linenumber" name="129" href="#129">129</a>                     <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="130" href="#130">130</a>                 }
<a class="jxr_linenumber" name="131" href="#131">131</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="132" href="#132">132</a>                 <em class="jxr_comment">// This is a worse whitespace ratio, use the previous value of</em>
<a class="jxr_linenumber" name="133" href="#133">133</a>                 <em class="jxr_comment">// cols and exit.</em>
<a class="jxr_linenumber" name="134" href="#134">134</a>                 --cols;
<a class="jxr_linenumber" name="135" href="#135">135</a>                 rows = (visibleCount - 1) / cols + 1;
<a class="jxr_linenumber" name="136" href="#136">136</a>                 hSpace = ((width - mMaxChildWidth * cols) / (cols + 1));
<a class="jxr_linenumber" name="137" href="#137">137</a>                 vSpace = ((height - mMaxChildHeight * rows) / (rows + 1));
<a class="jxr_linenumber" name="138" href="#138">138</a>                 <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="139" href="#139">139</a>             }
<a class="jxr_linenumber" name="140" href="#140">140</a> 
<a class="jxr_linenumber" name="141" href="#141">141</a>             ++cols;
<a class="jxr_linenumber" name="142" href="#142">142</a>         }
<a class="jxr_linenumber" name="143" href="#143">143</a> 
<a class="jxr_linenumber" name="144" href="#144">144</a>         <em class="jxr_comment">// Lay out children based on calculated best-fit number of rows and</em>
<a class="jxr_linenumber" name="145" href="#145">145</a>         <em class="jxr_comment">// cols.</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>         <em class="jxr_comment">// If we chose a layout that has negative horizontal or vertical space,</em>
<a class="jxr_linenumber" name="148" href="#148">148</a>         <em class="jxr_comment">// force it to zero.</em>
<a class="jxr_linenumber" name="149" href="#149">149</a>         hSpace = Math.max(0, hSpace);
<a class="jxr_linenumber" name="150" href="#150">150</a>         vSpace = Math.max(0, vSpace);
<a class="jxr_linenumber" name="151" href="#151">151</a> 
<a class="jxr_linenumber" name="152" href="#152">152</a>         <em class="jxr_comment">// Re-use width/height variables to be child width/height.</em>
<a class="jxr_linenumber" name="153" href="#153">153</a>         width = (width - hSpace * (cols + 1)) / cols;
<a class="jxr_linenumber" name="154" href="#154">154</a>         height = (height - vSpace * (rows + 1)) / rows;
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>         <strong class="jxr_keyword">int</strong> left, top;
<a class="jxr_linenumber" name="157" href="#157">157</a>         <strong class="jxr_keyword">int</strong> col, row;
<a class="jxr_linenumber" name="158" href="#158">158</a>         <strong class="jxr_keyword">int</strong> visibleIndex = 0;
<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; count; i++) {
<a class="jxr_linenumber" name="160" href="#160">160</a>             <strong class="jxr_keyword">final</strong> View child = getChildAt(i);
<a class="jxr_linenumber" name="161" href="#161">161</a>             <strong class="jxr_keyword">if</strong> (child.getVisibility() == GONE) {
<a class="jxr_linenumber" name="162" href="#162">162</a>                 <strong class="jxr_keyword">continue</strong>;
<a class="jxr_linenumber" name="163" href="#163">163</a>             }
<a class="jxr_linenumber" name="164" href="#164">164</a> 
<a class="jxr_linenumber" name="165" href="#165">165</a>             row = visibleIndex / cols;
<a class="jxr_linenumber" name="166" href="#166">166</a>             col = visibleIndex % cols;
<a class="jxr_linenumber" name="167" href="#167">167</a> 
<a class="jxr_linenumber" name="168" href="#168">168</a>             left = hSpace * (col + 1) + width * col;
<a class="jxr_linenumber" name="169" href="#169">169</a>             top = vSpace * (row + 1) + height * row;
<a class="jxr_linenumber" name="170" href="#170">170</a> 
<a class="jxr_linenumber" name="171" href="#171">171</a>             child.layout(left, top,
<a class="jxr_linenumber" name="172" href="#172">172</a>                     (hSpace == 0 &amp;&amp; col == cols - 1) ? r : (left + width),
<a class="jxr_linenumber" name="173" href="#173">173</a>                     (vSpace == 0 &amp;&amp; row == rows - 1) ? b : (top + height));
<a class="jxr_linenumber" name="174" href="#174">174</a>             ++visibleIndex;
<a class="jxr_linenumber" name="175" href="#175">175</a>         }
<a class="jxr_linenumber" name="176" href="#176">176</a>     }
<a class="jxr_linenumber" name="177" href="#177">177</a> }
</pre>
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